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Primitive Perfect Isosceles Right Triangled Square

Title: __ 18:57AA GHM

Order: 18

Horizontal side: 57 Vertical side: 57

Elements: 2√2, 3√2, 6, 8, 6√2, 8√2, 12, 15, 16, 12√2, 17, 15√2, 24, 17√2, 28, 20√2, 21√2, 30.

Code: 212 21 36 204 20 37 170 40 57 171 57 57 36 20 37 67 23 40 86 21 32 165 29 24 281 57 40 66 15 30 22 23 34 85 21 24 156 0 15 305 15 0 241 45 24 122 57 12 155 0 0 123 57 0

The properties below may precede order:side in a tiling's title:

Credit for Discovery

Just three people are credited with the discovery of Primitive Perfects:

Geoffrey H. Morley (GHM, England)

Jasper D. Skinner, II (JDS, United States)

William T. Tutte (WTT, Canada, 1917-2002) (15:44AI, 17:136AJ and 19:56AJ only)

21√2
20√2
17√2
17
3√2
6
8√2
16
28
6√2
2√2
8
15√2
30
24
12√2
15
12